Two models were discussed in which chloride ion concentration gradients would form in a steel reinforced concrete structure. Electrochemical testing to investigate the models was conducted on plain carbon steel specimens in a simulated concrete environment of saturated calcium hydroxide solution with varying concentrations of sodium chloride. The varying chloride ion concentrations promoted open circuit potential shifts. These potential shifts may lead to galvanic corrosion effects depending on the chloride ion concentration gradients in the structure.

Subject
Hydroxides, Chloride ion concentration, Circuit potentials, Passive films, Calcium, Density, Open circuits, Sodium chloride solution, Film formation, Steel, Corrosion mechanisms, Galvanic current, Concrete
Keywords:
concrete, concentration gradient, chloride gradient, potentiodynamic scans
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1994
Association for Materials Protection and Performance (AMPP)
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